Wearable Pad

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Control Android phone/tablet from Wear

There are some apps to control your PC from Android Wear via Android phone/tablet. However I couldn't find apps to control Android phone from Android wear. This is just a challenge to do that.

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Solution

Android has Input SubSystem, /dev/input/eventX the same as Linux, processing user input from input devices including touch screen. We can emulate user input by injecting input event to Input SubSystem, but normal user has no permissions and that is protected by SELinux. Therefore we need root permission and changing SELinux policy.

Changing SELinux policy

Use setenforce or supolicy command. I referred to stackoverflow:Q27496968. If the supolicy command is not available on your device, and you wish to automate changing of the SELinux policy use: SELinuxModeChanger (requires root).

Select touch screen from eventX

Android device has some /dev/input/eventX, X is number from 0, so you need to know which eventX links to your touch screen. The number of touch screen is depending on device. The following page is helpful for eventX: LMT Launcher's thread on XDA

For Nexus4, touch screen is /dev/input/event2, and Ratio X = 200%, and Ratio Y = 200%.

How to examine eventX of touch screen and Ratios

adb shell getevent -i

This command lists up /dev/input/eventX with details. Touch screen device has KEY (0001) and ABS (0003) entries in events section.

And a row labeled 0035 in ABS (0003) describes x-axis of touch screen. Range of x-axis is from min to max. You get a value for Ratio X in Wearable Pad settings by dividing the max by pixels of width of your screen. For Ratio Y, use max value in a row labeled 0036.

If cannot be divided as percent, round down to the nearest decimal percent.

Pad UI

IMPORTANT: Tap and longpress to exit Wearable Pad or perform extra actions.

For v0.2.0 or later

Phone/Tablet	Wear
Tap	Tap
Double Tap	Double Tap
Grab Mode	Triple Tap	Press without keeping on pressing Wear (From v0.2.1)
Taps (Up to 15)	Taps
Move Cursor	Swipe
Swipe	Tap + Swipe	Swipe after single tap
Tap + Swipe	Double Tap + Swipe	Zoom in/out by one finger
Taps + Swipe	Tap + Taps + Swipe	One more tap
Longpress	Long-Longpress	Keep pressing

Feature

• Turn screen on automatically

  Send wake up signal to handheld when start Wearable Pad.

• Grab mode

  Longpress without keeping on pressing Wearable Pad until another tap event. You can move icon on homescreen and change area of text selection.

• Transfer mode (from v0.3.0)

  Transfer touch event to another Android device.

  Wear ---> paired Phone (Transfer) ---> Tablet (Receiver)

Before v0.2.0

Phone/Tablet	Wear
Tap	Tap
Move Cursor	Swipe
Swipe	Longpress + Swipe
Tap + Swipe	Double Tap + Swipe
Taps + Swipe	Tap + Taps + Swipe
Longpress	Long-Longpress

Download

Wearable Pad APKs